CN114147328B - Plasma arc welding nozzle - Google Patents
Plasma arc welding nozzle Download PDFInfo
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- CN114147328B CN114147328B CN202111578161.5A CN202111578161A CN114147328B CN 114147328 B CN114147328 B CN 114147328B CN 202111578161 A CN202111578161 A CN 202111578161A CN 114147328 B CN114147328 B CN 114147328B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
Abstract
The invention relates to the technical field of arc welding equipment and discloses a plasma arc welding nozzle which comprises a nozzle, a tungsten electrode rod and a workpiece, wherein the tungsten electrode rod is fixedly arranged in the middle of the nozzle, and the bottoms of the nozzle and the tungsten electrode rod are aligned with a welding seam on the workpiece. The nozzle is prevented from being damaged by double arcs by arranging the inner protective shell inside the nozzle, in order to prevent double arc conditions caused by over-thick water-cooled wall, the inner protective shell is internally provided with the cooling cavity, the inner protection is connected with the cooling cavity inside the nozzle, the double arcs are prevented from being generated by water cooling, meanwhile, when the double arcs are generated, current is conducted away from the nozzle by the current conducting plate, magnetic cooling is realized by the current, the heat release is accelerated by the magnetic cooling, the cooling effect of the water cooling is matched, when the double arcs occur, three cooling modes are matched for use, the temperature of the protective shell is reduced, the burning-out of the protective shell and the nozzle is prevented, and the temperature of the cold gas film is reduced, so that the effect of thickening the cold gas film is achieved.
Description
Technical Field
The invention relates to the technical field of arc welding equipment, in particular to a plasma arc welding nozzle.
Background
The plasma arc welding equipment is improved on the basis of tungsten electrode argon arc welding, a main component of the plasma arc welding equipment is a welding gun, a tungsten electrode rod is arranged in the middle of the welding gun, argon is arranged between the tungsten electrode rod and a nozzle, current is conducted among the tungsten electrode rod, the nozzle and a workpiece, the argon is ionized to form electric arc through high-frequency oscillation by applying higher voltage, and then the electric arc with concentrated energy is formed through mechanical compression, water-cooling nozzle compression and magnetic field compression to weld the surface of the workpiece.
When welding, because the current is too big or the distance between the nozzle and the workpiece is too close, double arcs can be caused, and the generation of double arcs can cause the arc to break through a cold air film formed by argon gas and contact with the nozzle, and a high-voltage arc contacts with the nozzle, so that the nozzle is burnt out, and the replacement cost of the nozzle is increased.
Disclosure of Invention
Aiming at the defects of the existing nozzle for plasma arc welding in the background technology in the using process, the invention provides the nozzle for plasma arc welding, which has the advantages of protecting the nozzle and reducing the generation of double arcs and solves the problems in the background technology.
The invention provides the following technical scheme: the utility model provides a plasma arc welding nozzle, includes nozzle, tungsten utmost point stick, work piece, the middle part fixed mounting of nozzle has the tungsten utmost point stick, the bottom of nozzle, tungsten utmost point stick is aimed at the welding seam on the work piece, the bottom inner wall fixed mounting of nozzle has interior protective housing, the bottom and the outside fixed mounting of nozzle have insulating cover, be equipped with fixed mounting between outer spiro and the nozzle on the insulating cover, insulating cover is close to the bottom fixed mounting that nozzle central point put one end and install internal thread ring and interior protective housing, horizontal transition between the inside wall of insulating cover and the inside wall of interior protective housing, state insulating cover's inside and seted up the intake duct, insulating cover's inside fixed mounting has the conductor wire, the inside in nozzle has seted up the second cooling chamber, be provided with business turn over water installation on the second cooling chamber, outlet pipe, inlet tube have been seted up between second cooling chamber and the interior protective housing, the outside fixed mounting of nozzle has the heat dissipation frame, the inside in heat dissipation frame has seted up the magnetism cold chamber, the inside packing in magnetism cold chamber has paramagnetic gas, the upper and lower extreme of heat dissipation frame all installs the coil, one side that magnetism cold chamber is close to the nozzle intercommunication device, the other end of accuse gas communicates the electric shock device is close to one side of electric shock device.
Preferably, the coils are electrically connected through a conducting wire.
Preferably, the electric shock device comprises a deformation cavity, one side of the deformation cavity, which is close to the nozzle, is opened, a fixed contact is fixedly installed inside the deformation cavity, one side of the fixed contact, which is close to the coil, is electrically connected with the coil, an expansion alloy is fixedly installed on the other side of the fixed contact, a sliding contact is fixedly installed at the other end of the expansion alloy, the sliding contact is slidably installed inside the deformation cavity, a heat channel is formed in the bottom of the deformation cavity, which is close to the magnetic cooling cavity, and the heat channel communicates the magnetic cooling cavity and the deformation cavity.
Preferably, the electric shock device comprises a deformation cavity, one side of the deformation cavity, which is close to the nozzle, is opened, a fixed contact is fixedly installed inside the deformation cavity, one side of the fixed contact, which is close to the coil, is electrically connected with the coil, the other side of the fixed contact is fixedly provided with an expansion alloy, the other end of the expansion alloy is fixedly provided with a sliding contact, the sliding contact is slidably installed inside the deformation cavity, the deformation cavity is formed in the position, which is close to the bottom of the magnetic cooling cavity, and the magnetic cooling cavity and the deformation cavity are communicated with each other.
Preferably, the accuse gas device includes the gas off-take, the one side that the gas off-take is close to first cooling chamber is equipped with the spout, inside the casing was seted up to the spout, the spout runs through the gas off-take, the inside fixed mounting of spout has the expansion link, the other end fixed mounting of expansion link has the closure plate, the closure plate can be plugged up the gas off-take break-make completely.
Preferably, the outlet pipe includes the body, the one end tangent plane slope that the body is located first cooling chamber inside upwards, the export of body is towards the accuse gas device, the inside fixed mounting of body has the baffling board, the baffling board is along the linear equipartition of the axis of body, and the shape of baffling board is the pointed end of petal, the great one side of baffling board diameter is towards the accuse gas device, form the water hole between the baffling board.
The invention has the following beneficial effects:
1. the inner protection shell is arranged in the nozzle to prevent double arcs from damaging the nozzle, in order to prevent double arc conditions caused by over-thick water-cooled wall, the cooling cavity is arranged in the inner protection shell, the inner protection shell is connected with the cooling cavity in the nozzle, the double arcs are prevented from being generated by water cooling, meanwhile, when the double arcs are generated, current is conducted away from the nozzle by the current conducting plate, magnetic cooling is realized by the current, the heat release of gas is accelerated by the magnetic cooling, the cooling effect of the water cooling is matched, when the double arcs occur, three cooling modes are matched for use, the temperature of the protection shell is reduced, the burning-out of the protection shell and the nozzle is prevented, and the temperature of the cold gas film is reduced to achieve the effect of thickening the cold gas film.
2. According to the invention, the baffle plate is arranged on the water outlet pipe to prevent excessive paramagnetic gas from being taken away under the water cooling effect to reduce the air cooling effect, the water flow can flow along the side wall of the baffle plate and return the air flow due to different states of the water flow and the air flow after being impacted, and the air flow is separated from the water flow after being impacted due to the upward shape of the pipe opening of the water outlet pipe, so that the loss of paramagnetic gas is effectively reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 at A according to the present invention;
FIG. 3 is a schematic view of the structure of FIG. 1 at B according to the present invention;
FIG. 4 is a schematic view of the structure of FIG. 1 at C according to the present invention;
FIG. 5 is a schematic top view of the outlet pipe nozzle of the present invention;
FIG. 6 is a schematic sectional view of the structure D-D shown in FIG. 5 according to the present invention.
In the figure: 1. a nozzle; 2. a tungsten pole; 3. a workpiece; 4. an inner protective shell; 41. a housing; 42. a conductive plate; 43. a first cooling chamber; 44. a gas permeable membrane; 5. an insulating sleeve; 6. an air inlet channel; 7. a conductive wire; 8. a second cooling chamber; 9. a water inlet and outlet device; 10. a water outlet pipe; 101. a pipe body; 102. a baffle plate; 103. water passing holes; 11. a water inlet pipe; 12. a heat dissipation frame; 13. a magnetic cooling cavity; 14. a coil; 15. a gas control device; 151. an air outlet channel; 152. a chute; 153. an expansion rod; 154. a blocking plate; 16. an electric shock device; 161. a deformation chamber; 162. a fixed contact; 163. an expanded alloy; 164. a sliding contact; 165. and (4) a heat channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a plasma arc welding nozzle includes a nozzle 1, a tungsten rod 2, a workpiece 3, a tungsten rod 2 fixedly mounted in the middle of the nozzle 1, the bottom of the nozzle 1 and the tungsten rod 2 aligned with a welding seam on the workpiece 3, an inner protective shell 4 fixedly mounted on the inner wall of the bottom of the nozzle 1, an insulating sleeve 5 fixedly mounted on the bottom and outside of the nozzle 1, an outer spiral ring fixedly mounted on the insulating sleeve 5 and the nozzle 1, an inner threaded ring mounted on one end of the insulating sleeve 5 near the center of the nozzle 1 and not shown in the bottom fixed mounting diagram of the inner protective shell 4, the inner wall of the insulating sleeve 5 horizontally transits with the inner wall of the inner protective shell 4, the inner protective shell 4 is placed inside the nozzle 1 and fixed by the insulating sleeve 5 at the bottom, the inner protective shell 4 itself plays a role of protecting the nozzle 1 to prevent electric arc generated by gas ionization between the nozzle 1 and the tungsten rod 2 in the later period, when a double-arc phenomenon occurs, due to the existence of the inner protective shell 4, the electric arc acts on the inner protective shell 4 at the first time to prevent the current from directly acting on the nozzle 1, so that the nozzle 1 is burnt, the air inlet channel 6 is arranged inside the insulating sleeve 5, the electric lead 7 is fixedly arranged inside the insulating sleeve 5, the insulating sleeve 5 is made of insulating high-temperature-resistant material, the second cooling cavity 8 is arranged inside the nozzle 1, the water inlet and outlet device 9 is arranged on the second cooling cavity 8, the second cooling cavity 8 and the water inlet and outlet device 9 are of the existing structure, cold water is filled inside the second cooling cavity 8, water flow inside the second cooling cavity 8 is always in a flowing state through the water inlet and outlet pipe in the water inlet and outlet device 9, the water outlet pipe 10 and the water inlet pipe 11 are arranged between the second cooling cavity 8 and the inner protective shell 4, and the existence of the inner protective shell 4 is increased to protect the nozzle 1, at the moment, the thickness of the cooling wall is increased, when the cold air film flows from the surface of the inner protective shell 4, the thickness of the cold air film is reduced due to the reduction of the cooling effect, which easily causes the arc breakdown of the cold air film to generate double arcs, and in order to prevent the double arcs, at the moment, a cavity for cooling is arranged in the inner protective shell 4, a water outlet pipe 10 and a water inlet pipe 11 are arranged in the inner protective shell 4, namely, the water in the second cooling cavity 8 flows into the inner protective shell 4, so that the inner protective shell 4 can cool the cold air film conveniently, a heat dissipation frame 12 is fixedly arranged at the outer side of the nozzle 1, a magnetic cooling cavity 13 is arranged in the heat dissipation frame 12, and paramagnetic gas is filled in the magnetic cooling cavity 13, in order to prevent the gas inside the magnetic cooling cavity 13 from losing, a special gas supplement bottle can be arranged, when the gas pressure of the gas inside is too small, the gas is filled into the gas, the paramagnetic gas can be oxygen, nitric oxide, nitrogen dioxide or ozone, the paramagnetic gas can absorb heat when no magnetic field exists, and can release heat when an external magnetic field exists, the upper end and the lower end of the heat dissipation frame 12 are both provided with coils 14, the coils 14 are electrically connected through a lead, one side of the magnetic cooling cavity 13, which is close to the nozzle 1, is communicated with a gas control device 15, the other end of the gas control device 15 is communicated to the inner protective shell 4, one side of the coils 14, which is close to the nozzle 1, is provided with an electric shock device 16, and the electric connection is formed between the electric shock device 16 and the coils 14.
Wherein, refer to fig. 2, the inner protective shell 4 includes a shell 41, the inside fixedly connected with current-conducting plate 42 that the shell 41 is close to the center of the nozzle 1, the shell 41 is insulating material, the current-conducting plate 42 is conducting material, the first cooling chamber 43 has been seted up to the interior of shell 41, first cooling chamber 43 and outlet pipe 10, inlet tube 11 communicates, communicate between the bottom of current-conducting plate 42 and the conductor wire 7, communicate between the bottom of current-conducting plate 42 and the intake duct 6, the inside fixed mounting of intake duct 6 has a ventilated membrane 44, communicate between the top of first cooling chamber 43 and the accuse gas device 15, when the double arc condition takes place, the current punctures cold gas membrane and current-conducting plate 42 direct contact this moment, and the shell 41 is insulating material, can separate the current-conducting plate 42 with the current switch-on this moment, avoid the contact between current and the nozzle 1, prevent burning out of nozzle 1.
Referring to fig. 3, the electric shock device 16 includes a deformation chamber 161, one side of the deformation chamber 161 close to the nozzle 1 is opened, a fixed contact 162 is fixedly installed inside the deformation chamber 161, one side of the fixed contact 162 close to the coil 14 is electrically connected with the coil 14, the other side of the fixed contact 162 is fixedly installed with an expansion alloy 163, the other end of the expansion alloy 163 is fixedly installed with a sliding contact 164, the sliding contact 164 is slidably installed inside the deformation chamber 161, a heat channel 165 is opened at the bottom of the deformation chamber 161 close to the magnetic cooling chamber 13, the heat channel 165 communicates the magnetic cooling chamber 13 with the deformation chamber 161, the current on the coil 14 is conducted to the nozzle 1, and when the expansion alloy 163 is normally contacted between the sliding contact 164 and the nozzle 1, the sliding contact 164 is not in contact with the nozzle 1, once double arcs exist on the inner protection shell 4 inside the magnetic cooling cavity 13, heat of the conductive plate 42 rises, after the heat rises, water becomes water vapor, the water vapor flows into the magnetic cooling cavity 13 through the gas control device 15, at the moment, partial heat flows into the deformation cavity 161 through the heat channel 165, the expansion alloy 163 is deformed by heat, then the sliding contact 164 is pushed open, the sliding contact 164 is in contact with the nozzle 1, a circuit on the coil 14 is communicated, once the double arcs do not occur, in order to avoid a short circuit occurring on the nozzle 1 due to a circuit at the coil 14, the sliding contact 164 is not in contact with the nozzle 1, and the circuit is disconnected.
Wherein, referring to fig. 4, the gas control device 15 includes a gas outlet channel 151, a sliding groove 152 is disposed on one side of the gas outlet channel 151 close to the first cooling cavity 43, the sliding groove 152 is disposed inside the housing 41, the sliding groove 152 penetrates through the gas outlet channel 151, an expansion rod 153 is fixedly disposed inside the sliding groove 152, a blocking plate 154 is fixedly disposed at the other end of the expansion rod 153, the blocking plate 154 can completely block the opening and closing of the gas outlet channel 151, when a double arc phenomenon occurs, the temperature of the conductive plate 42 rises due to the presence of current, the expansion rod 153 absorbs heat and deforms, so that the blocking plate 154 moves downward, because the expansion rod 153 cannot block the gas outlet channel 151, at this time, the gas in the first cooling cavity 43 can flow into the gas outlet channel 151 from a gap at the expansion rod 153, the gas control device 15 mainly controls the opening and closing of the gas outlet channel, and prevents normal water cooling, and the water cooling effect is affected by the presence of the gas control device 15.
Referring to fig. 5 and 6, the water outlet pipe 10 includes a pipe body 101, a section of one end of the pipe body 101, which is located inside the first cooling cavity 43, is inclined upward, an outlet of the pipe body 101 faces the air control device 15, a baffle plate 102 is fixedly installed inside the pipe body 101, the baffle plate 102 is linearly and uniformly distributed along an axis of the pipe body 101, the baffle plate 102 is in a petal-shaped tip, one side of the baffle plate 102 with a larger diameter faces the air control device 15, a water through hole 103 is formed between the baffle plates 102, due to the shape limitation of the water outlet pipe 10, the flow of water is blocked, when the water and the air flow are blocked by the bottom of the pipe body 101, the air flow is baffled, the water flows out from the water outlet pipe 10, the flow of the water flows in a direction of the second cooling cavity 8, at this time, due to the existence of the baffle plate 102, the air flow is baffled obliquely upward under the effect of the pipe body 101 and the baffle plate 102, the baffled direction faces the air control device 15, due to different movement states after the impact of the air flow and the water flow, the water flow flows in the original direction, the direction of the second cooling cavity 8, the air flow is also, the air flow is relatively light, the air flow is prevented from being baffled, and the air flow is easily separated from the excessive air.
In summary, under normal conditions, at this time, the whole welding gun normally works, cold water enters the second cooling cavity 8 from the water inlet and outlet device 9, the second cooling cavity 8 is used for cooling the nozzle 1, then the water outlet pipe 10 and the water inlet pipe 11 are used for flowing the cold water in the second cooling cavity 8 into the first cooling cavity 43, then the cold water in the second cooling cavity 8 is used for cooling the housing 41, thereby preventing the thickness of the cold air film from decreasing due to the excessive thickness of the cold water wall, preventing the occurrence of double arcs, when double arcs occur, due to the existence of the conductive plate 42, the arcs break through the cold air film to contact the conductive plate 42, the temperatures inside the conductive plate 42, the housing 41 and the first cooling cavity 43 rise, at this time, the temperature rise of the housing 41 acts on the gas control device 15, the expansion rod 153 absorbs heat, the deformation occurs, the blocking plate 154 moves downwards, and due to the expansion rod 153 cannot block the gas outlet channel 151, at this time, the gas in the first cooling cavity 43 will flow into the gas outlet channel 151 from the gap of the expansion rod 153, at this time, the water inside the first cooling cavity 43 will sublimate due to the over-high temperature and become water vapor, at this time, the gas outlet channel 151 is in the unblocked state, the water vapor will enter the magnetic cooling cavity 13 from the gas outlet channel 151, part of the heat will flow into the deformation cavity 161 through the heat channel 165, so that the expansion alloy 163 is heated and deformed, then the sliding contact 164 is pushed open, so that the sliding contact 164 contacts with the nozzle 1, at this time, the current on the conductive plate 42 flows to the conductive plate 7 under the guidance of the conductive plate 42, the current will be guided to the coil 14 at the bottom of the heat dissipation frame 12 through the guidance of the conductive plate 7, and both coils 14 are electrified with current, due to the action of the heat above, so that the sliding contact 164 contacts with the nozzle 1, at this time, the current flows from the conductive plate 42, the circuit formed among the air inlet channel 6, the coil 14, the fixed contact 162, the expansion alloy 163, the sliding contact 164 and the nozzle 1 is in a connection state, the circuit is connected, the coil 14 forms magnetic fields at the upper and lower ends of the heat dissipation frame 12, the gas inside the magnetic cooling cavity 13 is paramagnetic gas, heat release is accelerated under the action of the magnetic field, the water vapor inside the first cooling cavity 43 flows to the inside of the magnetic cooling cavity 13, at the moment, the contact area of the water and the cold air inside is increased due to the steam state, heat exchange is accelerated, meanwhile, a water discharging device is arranged at the bottom of the magnetic cooling cavity 13, the water cooled and liquefied by the steam is discharged, the cold air sinks under the action of the hot gas above, the air flow flows to the inside of the first cooling cavity 43 from the air inlet channel 6, and the cold air flows upwards from the bottom of the first cooling cavity 43, then, the heat inside the heat is absorbed and changed into hot gas, the hot gas flows upwards, the hot gas flows towards the air outlet channel 151 under the baffling effect of the water outlet pipe 10, then, after the hot gas is heated, due to the fact that the volume is increased, an air flow circulation can be formed, the gas can enter the magnetic cooling cavity 13 from the air outlet channel 151 after being heated in the first cooling cavity 43, then, heat release is accelerated under the effect of a magnetic field, in the process, the first cooling cavity 43 is operated due to the fact that water cooling is changed from an original water cooling mode to a combination of water cooling and air cooling and magnetic cooling, the heat dissipation of the gas is accelerated by utilizing the magnetic cooling, the temperature of the cold gas film is reduced by improving the cooling speed of the first cooling cavity 43, the thickness of the cold gas film is increased by reducing the outside temperature of the cold gas film, the conductive plate 42 and the nozzle 1 are protected, burnout is avoided, and meanwhile, and the breakdown amount of electric arcs is reduced.
The using method of the invention is as follows:
under normal conditions, at this time, the whole welding gun works normally, cold water enters the second cooling cavity 8 from the water inlet and outlet device 9, the second cooling cavity 8 is used for cooling the nozzle 1, then the water outlet pipe 10 and the water inlet pipe 11 are used for enabling the cold water in the second cooling cavity 8 to flow into the first cooling cavity 43, then the shell 41 is cooled by the cold water in the second cooling cavity 8, the reduction of the thickness of the cold air film caused by the excessive thickness of the cold water wall is prevented, the occurrence of double arcs is prevented, when the double arcs occur, due to the existence of the conducting plate 42, the arcs puncture the cold air film to be in contact with the conducting plate 42, the temperatures in the conducting plate 42, the shell 41 and the first cooling cavity 43 rise, at this time, the temperature rise of the shell 41 acts on the air control device 15, the expansion rod 153 absorbs heat and deforms, so that the blocking plate 154 moves downwards, and because the expansion rod 153 cannot block the air outlet channel 151, at this time, the gas in the first cooling cavity 43 will flow into the gas outlet channel 151 from the gap of the expansion rod 153, at this time, the water inside the first cooling cavity 43 will sublimate due to the over-high temperature and become water vapor, at this time, the gas outlet channel 151 is in the unblocked state, the water vapor will enter the magnetic cooling cavity 13 from the gas outlet channel 151, part of the heat will flow into the deformation cavity 161 through the heat channel 165, so that the expansion alloy 163 is heated and deformed, then the sliding contact 164 is pushed open, so that the sliding contact 164 contacts with the nozzle 1, at this time, the current on the conductive plate 42 flows to the conductive line 7 under the guidance of the conductive plate 42, the current will be guided to the coil 14 at the bottom of the heat dissipation frame 12 through the guidance of the conductive line 7, and both coils 14 are electrified with current, due to the action of the heat above, so that the sliding contact 164 contacts with the nozzle 1, at this time, the gas inlet channel 6, the conductive plate 42, the circuit formed among the coil 14, the fixed contact 162, the expansion alloy 163, the sliding contact 164 and the nozzle 1 is in a connection state, the circuit is connected, magnetic fields are formed at the upper end and the lower end of the heat dissipation frame 12 of the coil 14, because the gas inside the magnetic cooling cavity 13 is paramagnetic gas, heat release is accelerated under the action of the magnetic field, and because the water vapor inside the first cooling cavity 43 flows toward the inside of the magnetic cooling cavity 13, at this time, because the water is in a vapor state, the contact area with the inside cold air is increased, heat exchange is accelerated, meanwhile, a drainage device is arranged at the bottom of the magnetic cooling cavity 13, the water cooled and liquefied by the vapor is drained away, and meanwhile, the cold air sinks under the action of the upper hot gas, the air flow flows from the air inlet 6 toward the inside of the first cooling cavity 43, the cold air flows upward from the bottom of the first cooling cavity 43, then absorbs the heat inside heat to become hot gas, the hot gas flows upward, flows toward the air outlet 151 under the baffling action of the water outlet pipe 10, then, an air flow circulation is formed due to increase in volume after the air is heated, and then, the air flows into the magnetic cooling cavity 43, and the heat release is accelerated under the action of the magnetic field 13.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a plasma arc welding nozzle, includes nozzle (1), tungsten utmost point stick (2), work piece (3), the middle part fixed mounting of nozzle (1) has tungsten utmost point stick (2), the bottom of nozzle (1), tungsten utmost point stick (2) is aimed at the weld joint on work piece (3), its characterized in that: an inner protective shell (4) is fixedly installed on the inner wall of the bottom of the nozzle (1), an insulating sleeve (5) is fixedly installed on the bottom and the outer side of the nozzle (1), an outer spiral ring and the nozzle (1) are fixedly installed on the insulating sleeve (5), an inner thread ring and the bottom of the inner protective shell (4) are installed at one end, close to the center of the nozzle (1), of the insulating sleeve (5), a horizontal transition is formed between the inner side wall of the insulating sleeve (5) and the inner side wall of the inner protective shell (4), an air inlet channel (6) is formed in the insulating sleeve (5), a conductive wire (7) is fixedly installed in the insulating sleeve (5), a second cooling cavity (8) is formed in the nozzle (1), a water inlet and outlet device (9) is arranged on the second cooling cavity (8), a water outlet pipe (10) and a water inlet pipe (11) are formed between the second cooling cavity (8) and the inner protective shell (4), a heat dissipation frame (12) is fixedly installed on the outer side of the nozzle (1), a magnetic cooling cavity (13) is formed in the inner portion, a gas coil (13), and a paramagnetic gas coil (14) is installed on one side, and communicated with the nozzle (1) and communicated with the paramagnetic gas coil (15), the other end of the gas control device (15) is communicated to the inner protective shell (4), one side, close to the nozzle (1), of the coil (14) is provided with an electric shock device (16), and the electric shock device (16) is electrically connected with the coil (14).
2. A plasma arc welding nozzle according to claim 1, wherein: the coils (14) are electrically connected through conducting wires.
3. The plasma arc welding nozzle according to claim 1, wherein: interior protective housing (4) includes casing (41), casing (41) are close to inside fixedly connected with current conducting plate (42) at nozzle (1) center, casing (41) are insulating material, current conducting plate (42) are conducting material, first cooling chamber (43) have been seted up to the interior of casing (41), first cooling chamber (43) and outlet pipe (10), inlet tube (11) intercommunication, communicate between the bottom of current conducting plate (42) and conductor wire (7), communicate between the bottom of current conducting plate (42) and intake duct (6), the inside fixed mounting of intake duct (6) has ventilated membrane (44), communicate between the top of first cooling chamber (43) and accuse gas device (15).
4. A plasma arc welding nozzle according to claim 1, wherein: the electric shock device (16) comprises a deformation cavity (161), one side of the deformation cavity (161) close to the nozzle (1) is opened, a fixed contact (162) is fixedly installed inside the deformation cavity (161), one side of the fixed contact (162) close to the coil (14) is electrically connected with the coil (14), an expansion alloy (163) is fixedly installed on the other side of the fixed contact (162), a sliding contact (164) is fixedly installed at the other end of the expansion alloy (163), the sliding contact (164) is installed inside the deformation cavity (161) in a sliding mode, a heat channel (165) is formed in the bottom of the deformation cavity (161) close to the magnetic cooling cavity (13), and the heat channel (165) communicates the magnetic cooling cavity (13) and the deformation cavity (161).
5. A plasma arc welding nozzle according to claim 1, wherein: accuse gas device (15) are including gas outlet channel (151), one side that gas outlet channel (151) are close to first cooling chamber (43) is equipped with spout (152), casing (41) have been seted up inside spout (152), gas outlet channel (151) are run through in spout (152), the inside fixed mounting of spout (152) has expansion link (153), the other end fixed mounting of expansion link (153) has closure plate (154), closure plate (154) can be plugged up gas outlet channel (151) break-make completely.
6. The plasma arc welding nozzle according to claim 1, wherein: the water outlet pipe (10) comprises a pipe body (101), the pipe body (101) is located in a first cooling cavity (43) and is inclined upwards, an outlet of the pipe body (101) faces to the air control device (15), a baffle plate (102) is fixedly mounted inside the pipe body (101), the baffle plate (102) is linearly and uniformly distributed along the axis of the pipe body (101), the baffle plate (102) is in a petal-shaped tip end, one side, with the larger diameter, of the baffle plate (102) faces to the air control device (15), and a water through hole (103) is formed between the baffle plate (102).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111578161.5A CN114147328B (en) | 2021-12-22 | 2021-12-22 | Plasma arc welding nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111578161.5A CN114147328B (en) | 2021-12-22 | 2021-12-22 | Plasma arc welding nozzle |
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| CN114147328A CN114147328A (en) | 2022-03-08 |
| CN114147328B true CN114147328B (en) | 2022-12-13 |
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| CN114799411B (en) * | 2022-05-13 | 2023-01-03 | 扬州欧拉工业设计有限公司 | Thermal cutting device for automobile disassembly |
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| CN109465527A (en) * | 2019-01-09 | 2019-03-15 | 湘潭大学 | A kind of magnetic control swing plasma arc welding (PAW) connection device for narrow gap |
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| GB1221317A (en) * | 1967-04-17 | 1971-02-03 | Manager Of The Academia Republ | A plasma arc generator |
| CA2065025A1 (en) * | 1989-08-17 | 1991-02-18 | Nicholas A. Sanders | Plasma arc torch with improved nozzle shield and step flow |
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| CN114147328A (en) | 2022-03-08 |
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